Why can't we see Zai's face?

Due to the strange way his character seems to be angled all the time. There are many theories for this, some to do with the possibility that Zai, like Shelly doesn't have a face or that everything is told through Oz's perspective, an inference from chapter 4 I believe where it seemed like Oz was narrating the story, but my personal favorite and current choice is that Jun is simply being her usual trollish self and wishes to save his face as a prize for later when she can find a suitable way to make us pay dearly for it....either that or he looks far too much like Yura and thus cannot/should not be shown....ever *shudders*